補足成分3は,脳脊髄液をレプトメニンゲアル転移に適応させる
Adrienne Boire1, Yilong Zou2, Jason Shieh2
1Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
Cell
|March 12, 2017
まとめ
脳液に広がったのがんは,コンプリメントC3によって引き起こされる. 前臨床モデルでは,C3シグナリングをターゲットにすることで,この致死性がんの進行を抑制した.
科学分野:
- 腫瘍学
- 免疫学
- 神経科学
背景:
- レプトメニンゲアル転移 (脳脊髄液に転移した癌) は,進行した癌の致命的な合併症です.
- レプトメニゲル転移を誘発するメカニズムは,まだ十分に理解されていません.
- 癌細胞は 独特の脳脊髄液の微小環境に 適応しなければなりません
研究 の 目的:
- レプトメニンゲル転移の背後にある分子メカニズムを解明する.
- 脳脊髄液における癌細胞の生存と増殖を可能にする 重要な要因を特定する.
- レプトメニゲル転移を標的とした治療戦略を探求する.
主な方法:
- 肺癌と乳癌の細胞系が利用され 脳脊髄液に浸透することが知られている.
- レプトメニゲル転移の臨床前モデルを開発した.
- 癌細胞と脳脊髄液における補足成分3 (C3) 発現量
- 血液-脳脊髄液の障壁を壊すC3の役割を調査した.
- C3シグナリングの治療効果を評価した.
主要な成果:
- 補足成分3 (C3) は,レプトメニンゲル転移モデルで上位調節され,脳脊髄液における癌の成長に不可欠でした.
- 脳脊髄液内の癌細胞は C3 を生成し,患者の病気の進行と相関していました.
- 主要腫瘍におけるC3発現は,レプトメニンゲル再発を予測した.
- 癌に由来するC3は 胸膜のC3a受容体を活性化させ 血液-脳脊髄液の障壁を破壊しました
- この干渉により,血由来のミトゲンが脳脊髄液に侵入し,癌細胞の増殖を促した.
- C3シグナリングの薬理学的阻害は,臨床前モデルで治療効果を示した.
結論:
- 補足成分3 (C3) は,レプトメニンゲル転移を促進する上で重要な役割を果たします.
- 血液-脊髄液の障壁のC3媒介による破壊は,脳脊髄液における癌の成長を可能にする重要なメカニズムです.
- C3シグナリングをターゲットにすることは,レプトメニゲル転移の管理のための有望な治療戦略です.
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